This documentary was always going to be a tough watch. But the details of the brutal gang rape and murder of medical student Jyoti Singh need to be shared if we want to strive for gender equality across the world.

India’s Daughter touches on all the issues raised by this case, from the Indian justice system’s record on rape to women’s rights to poverty to the death penalty. Unfortunately, there is only so much that can Udwin can cram into the space of an hour and some issues are merely mentioned, such as female foeticide or acid attacks. There is so much to discuss and debate here that only a whole series could really do justice to this topic.

However, Udwin does an impressive job of including all the key issues and a little bit more. The result is a moving and insightful film that takes an objective look at the rape case. She explores the multiple reasons why this crime could have happened and takes a panoramic approach.

Mukesh Singh, who appears in the film, was sentenced to death for his part in the 2012 rape

Perhaps some of the most powerful moments are the interview scenes with one of the rapists Mukesh Singh, who is on death row.

His comments about a woman being more responsible for rape than a man have been heavily quoted in the press this week. On their own, they are shocking but in the context of the documentary they highlight the attitudes to women in India.

The comments made by AP Singh, one of the Defence Lawyers for the rapists, are equally as shocking. He says that he would set a female relative alight in front of her family if he discovered she had been “engaged in pre-marital activities”.

Along with the traditional views of old India, Udwin’s film reveals a hopeful new India and a generation who are demanding change. In the midst of injustice and inequality, a new voice is rising up from this horrific case.

Udwin also throws things onto the flipside when the wife of one of the rapists asks, “Am I not a daughter of Delhi too? A husband protects a wife, who will protect me?” The comments really turn the situation around but also illustrate why attitudes to women need to change so desperately not just in this nation – but globally.

In pictures: India in shock after teenage girls 'gang raped and hanged'

In pictures: India in shock after teenage girls 'gang raped and hanged'

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Sohan, father and uncle of Murti and Pushpa, the two girls who were raped and hanged in Katra Sadatganj in Uttar Pradesh, is comforted by his mother (Photo Simon de Trey-White)

Simon de Trey-White

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Murti's mother is briefed by the local Senior Superintendant of Police Atul Saxena (Photo Simon de Trey-White)

Simon de Trey-White

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Murti’s brother Veerendar (Photo Simon de Trey-White)

Simon de Trey-White

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Villagers stand by the mango tree from which the two girls were hanged (Photo Simon de Trey-White)

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Villagers and media throng the home of the murdered teenage girls (Photo Simon de Trey-White)

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Congress party Vice President Rahul Gandhi interacts with women during his visit to the village of the two girls

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Demonstrators from All India Democratic Women's Association (AIDWA) hold placards and shout slogans during a protest in New Delhi against the recent killings

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Members of the All India Democratic Women's Association (AIDWA) shout slogans during the protest

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Members of Jawaharlal Nehru University Students Union shout slogans as they participate in a protest against the gang rape

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A member of Jawaharlal Nehru University Students Union shouts slogans

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An activist places a candle on a pavement during a candle lit vigil to protest against the gang rape of two teenage girls

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Activists hold candles during a vigil

The culture of victim-blaming is explored, it is a topic that is just as much a Western debate as it is an Indian one and makes this documentary so much more than just an “Indian problem”.

Ultimately, there are no easy answers or quick-fix solutions here and Udwin is all too aware of this. India’s Daughter is a necessary watch – not just for the women of India but for women across the world.